Question 30
Question 30 of 40
Question image for Q30
Periodic Table
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No letter options?
Older MCQs might not have the typical A, B, C, D choices. They have choices 1, 2, 3, and a combination of them is the answer. Below is the key that maps such combinations to the answer.
A 1, 2 and 3 are correct
B 1 and 2 only are correct
C 2 and 3 only are correct
D 1 only is correct
Topics Tested
10. Chemistry of the envi...
10.2. Fertilisers

Describe the use of NPK fertilisers to provide the elements nitrogen, phosphorus and potassium for improved plant growth

10. Chemistry of the envi...
10.1. Water

State that some of these substances are beneficial, including: (a) dissolved oxygen for aquatic life (b) some metal compounds provide essential minerals for life